public override bool Save(System.IO.Stream stream, PureImage image)
{
GMapImage ret = (GMapImage)image;
if (ret.Img != null)
{
try
{
PngBitmapEncoder e = new PngBitmapEncoder();
e.Frames.Add(BitmapFrame.Create(ret.Img as BitmapSource));
e.Save(stream);
e = null;
}
catch
{
return(false);
}
}
else
{
return(false);
}
return(true);
}
//static readonly byte[] pngHeader = { 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A };
//static readonly byte[] jpgHeader = { 0xFF, 0xD8, 0xFF };
//static readonly byte[] gifHeader = { 0x47, 0x49, 0x46 };
//static readonly byte[] bmpHeader = { 0x42, 0x4D };
public override PureImage FromStream(System.IO.Stream stream)
{
GMapImage ret = null;
if (stream != null)
{
var type = stream.ReadByte();
stream.Position = 0;
ImageSource m = null;
switch (type)
{
// PNG: 0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A
case 0x89:
{
var bitmapDecoder = new PngBitmapDecoder(stream, BitmapCreateOptions.IgnoreColorProfile, BitmapCacheOption.OnLoad);
m = bitmapDecoder.Frames[0];
bitmapDecoder = null;
}
break;
// JPG: 0xFF, 0xD8, 0xFF
case 0xFF:
{
var bitmapDecoder = new JpegBitmapDecoder(stream, BitmapCreateOptions.IgnoreColorProfile, BitmapCacheOption.OnLoad);
m = bitmapDecoder.Frames[0];
bitmapDecoder = null;
}
break;
// GIF: 0x47, 0x49, 0x46
case 0x47:
{
var bitmapDecoder = new GifBitmapDecoder(stream, BitmapCreateOptions.IgnoreColorProfile, BitmapCacheOption.OnLoad);
m = bitmapDecoder.Frames[0];
bitmapDecoder = null;
}
break;
// BMP: 0x42, 0x4D
case 0x42:
{
var bitmapDecoder = new BmpBitmapDecoder(stream, BitmapCreateOptions.IgnoreColorProfile, BitmapCacheOption.OnLoad);
m = bitmapDecoder.Frames[0];
bitmapDecoder = null;
}
break;
// TIFF: 0x49, 0x49 || 0x4D, 0x4D
case 0x49:
case 0x4D:
{
var bitmapDecoder = new TiffBitmapDecoder(stream, BitmapCreateOptions.IgnoreColorProfile, BitmapCacheOption.OnLoad);
m = bitmapDecoder.Frames[0];
bitmapDecoder = null;
}
break;
default:
{
Debug.WriteLine("WindowsPresentationImageProxy: unknown image format: " + type);
}
break;
}
if (m != null)
{
ret = new GMapImage();
ret.Img = m;
if (ret.Img.CanFreeze)
{
ret.Img.Freeze();
}
}
}
return(ret);
}